Diamond, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 13° 30° -24° (1985) 59° (1975) 1.75" NA
February 18° 35° -24° (1982) 70° (1976) 1.59" NA
March 29° 47° -3° (1978) 86° (1986) 2.74" NA
April 39° 61° 7° (1982) 92° (1986) 3.54" NA
May 50° 73° 27° (1971) 96° (1975) 3.95" NA
June 59° 83° 35° (1972) 103° (1988) 4.16" NA
July 63° 85° 44° (1979) 103° (1983) 3.72" NA
August 61° 83° 40° (1986) 102° (1988) 3.4" NA
September 53° 76° 27° (1974) 97° (1971) 2.95" NA
October 41° 64° 16° (1988) 91° (1971) 2.54" NA
November 31° 48° -1° (1977) 79° (1978) 3.09" NA
December 19° 35° -20° (1983) 69° (1982) 2.36" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
May 1 44° 67° 31° (1978) 82° (1985) 0.12" NA
May 2 45° 68° 30° (1978) 89° (1992) 0.12" NA
May 3 45° 68° 27° (1971) 79° (1982) 0.12" NA
May 4 45° 69° 31° (1973) 79° (1982) 0.12" NA
May 5 46° 69° 32° (1973) 88° (1980) 0.12" NA
May 6 46° 69° 30° (1992) 88° (1980) 0.12" NA
May 7 46° 70° 28° (1989) 84° (1982) 0.12" NA
May 8 47° 70° 34° (1977) 86° (1988) 0.12" NA
May 9 47° 70° 28° (1989) 87° (1993) 0.12" NA
May 10 47° 71° 31° (1972) 88° (1979) 0.12" NA
May 11 48° 71° 33° (1989) 89° (1987) 0.13" NA
May 12 48° 72° 30° (1981) 90° (1982) 0.13" NA
May 13 48° 72° 33° (1971) 90° (1982) 0.13" NA
May 14 49° 72° 38° (1984) 89° (1982) 0.13" NA
May 15 49° 73° 38° (1984) 92° (1982) 0.13" NA
May 16 50° 73° 33° (1984) 87° (1971) 0.13" NA
May 17 50° 73° 34° (1973) 90° (1971) 0.13" NA
May 18 50° 74° 37° (1973) 90° (1977) 0.13" NA
May 19 51° 74° 38° (1994) 91° (1977) 0.13" NA
May 20 51° 75° 35° (1981) 96° (1975) 0.13" NA
May 21 51° 75° 39° (1971) 92° (1977) 0.13" NA
May 22 52° 75° 36° (1971) 91° (1987) 0.13" NA
May 23 52° 76° 45° (1990) 91° (1975) 0.13" NA
May 24 52° 76° 37° (1992) 93° (1975) 0.13" NA
May 25 53° 76° 35° (1992) 91° (1977) 0.13" NA
May 26 53° 77° 37° (1979) 94° (1977) 0.13" NA
May 27 53° 77° 32° (1992) 94° (1985) 0.13" NA
May 28 54° 77° 34° (1971) 93° (1978) 0.13" NA
May 29 54° 78° 37° (1971) 94° (1978) 0.13" NA
May 30 54° 78° 38° (1984) 91° (1978) 0.14" NA
May 31 55° 78° 41° (1990) 92° (1988) 0.14" NA
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